Note that there are two references by J.D. Dana in this PDF file (one beginning on original page 6 and one beginning on original page 10).

Transcription

1 Note that there are two references by J.D. Dana in this PDF file (one beginning on original page 6 and one beginning on original page 10).

2 P R O C E E D I N G S OF THE ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA. VOL. VI. 1852, PHILAD ELPHIA. PRINTED FOR THE ACADEMY, By Merrihew & Thompson, Merchant street, above FOuTth, 1854.

3 INDEX TO VOLUME VI. Abell, John, deposit in museum, lxiv. Abert, Col. J. J., (Ion. to lib., xxviii., xxxii., lxxiii. Acad. C. L. C. Nat. Curiosorum, don. to lib. xiv., xlix., lix,, lxxvi. Acad. Nationale des Sci. &c. de Lyon, don. to lib. lxix. Adams, Prof. C. B., don. to lib., xxxvi, xlviii. Agardh, J. G., don. to lib., xlv. Agassiz, Prof., communication from, in relation to Cambarus Gambelii, 375. Agnew, Rev. Win. G., don. to mus. lxxv. Albany Institute. don. to lib., lvi. American Academy of Arts and Sci., don. to lib., lxix. American Philosophical Society, don. to lib., ix., xxv., lxxvi. American Pomolog. Society, don.- to lib., xlix. Anatomical Collection of the late Dr. S. G. Morton, presented by members and others, Ixiv. Annals of Science, don. of by Editor, lxv, lxvi, lxix, lxxi, lxxii, lxxiii, lxxviii. Andrews, Israel D., don. to lib., lxxvi. Ashmead, Chas. C., don. to mus., xxxv. lix. Ashmead, Samuel, don. to mus., xvi., xxxv., xliv., lxxii. Remiiarks on a collection of Marine Algae, 147. Audubon and Bachman, description of a new American Fox, 114. descriptions of new species, 300; Descriptions of some new Fishes from the River Zuni, 368; Description of new species of Fishes, collected by Mr. John H. Clark, on the U. S and Mexican Boundary Commission, 387; Description of new species ef Fishes, collected by Capts. Marcy and Mc- Clellan in Arkansas, 390. Bache, Prof. F., don. to lib., lxxviii. Bailey, Prof. J. W., (see Harvey.) Barry, Rev. A. C., don. to mus., lxviii. Bathygniathus borealis, lower jaw of, presented by Dr. Leidy, Mr. Lea and W. S. Vaux, lxxiv. Bischoff, Dr. G. LG., don. to lib., xxxviii. Blagoe, Beiij., don. to mus., xliv. Bland, Thomas, don. to lib., xlv. Boston Soc. of Nat. History, don. to lib. by, ii., vi., xi., xiv., xvii., xxviii., kxxiii., xlix., lvi., lviii., lxvii., lxx. Botto, G. D., don. to lib., ii. Bou6. Dr. Ami, don. to lib., lxxvii. Brasier, A. J., don. to lib., lxvii. Bridges, Dr. R., don. to lib., xiv. Brown, F., Jr., dorn. to mus., lxiv. Browne, Peter A., don. to lib., xxii. Budd, Dr. C. H., don. to mus., viii*, xvi. xvii. Burtt, Dr., U. S. N., don. to mus., i., viii., xvi., xvii., xxvii., xxxii.; don. to lib., xxii. ; on the influence of SuIphuretted Hydrogen arising from the Bay of Callao on Fishes in its waters,i. Butler, Pierce, don. to mins., liii. By-Laws, amendments to, 375, 403. Baird, Prof. S. F., note in reference to Vulpes Utah, 124. Baird, Prof. and C. Girard, on the characters of some new Reptiles in the Museum of the Smithsonian Institution, 68, 125,, 173; Descriptions of new species of Reptiles, collected by the U. S. Expl. Exp., Capt. Wilkes, 174, 420; List of Reptiles collected in California by Dr. J. I.e Conte, with a e- 5 ea 2~ Carson, Prof. Jos., don. to lib., xiv. 1. Carter, Dr. Charles, don. to mus., lxiv. Cassin, John, don. to mus., i.; remarks on the Birds from the Arctic regions, presented by Dr. Kane, 107 ; an- nouncement of Dr. Heermann's return from California, 147 ; Description of new species of Birds in the collection of the Acad. Nat. Sci., 184;

4 iv. INDEX. Catalogue of Halcyonidae, 188; Remarks on a new species of Scalops from Oregon, 242; Catalogue of Hirundinida in Collection of Acad. Nat. Sci., 369; Description of new species of Hirundinidoe and Psittacidce, in Collection of A. N. S., 369; Synopsis of Falconide of America north of Mexico, 450. Charleston Med. Journal and Review, don. of; by Editors, vii., xiv., xxx., xxxviii., 1., lviii., lxvii., lxx., lxxii., lxxviii. Clapp, Dr. A., don. to lib., lxv. Clay, Jos. A., don. to muis., lxiv. Coates, Dr. B. H., don. to mus., vii.; correction of an error in Dr. Smyth's work on the Unity of the Human Races, 191. Cole, Mrs., don. to lib., lxxviii. Committee on Proceedings, Report by, 219. Committee on Mammalogy, Report by, 220. Committee to communicate with Coin. Perry, in relation to making collections in India, by the U. S. Japan Exp., 55. Committee on the purchase of Dr. Morton's Anatomical collection, 304. Committee on the occasion of the decease of J. Price Wetherill, 376. Committees, Standing, for 1852, 30; for 1853, 239. Committees on Scientific Papers: By Dr. Wetherill; Examination of Molybdate of Lead, from Phbenixville, Penna., 52 an(l 117; Chemical Investigation of the Honey Ant, 107 ; on the food of the Queen Bee, 117; on Mr. Sumnner's Analyses of the Cotton Plant and Seed, as communicated by Dr. Wetherill, 195: By Mr. Lea; description of a new species of Syrnphynote Unio, 52; description of a fossil Saurian, from the New Red Sandstone of Penna., 72; onl some new fossil Molluscs in the Carboniferous Slates of Penna., 72; Description of a new species of Eschara, 106; Notice of the Mya nodulosa Wood, 325: By Col. G. A. McCall: description of a new species of Carpodacus, 56: By Dr. Woodhouse; Description of new species of Vireo and Zonotrichia, 56; Description of a new species of Lepus, 72 ; of a new species of Ectopistes, 72; Descriptiorn of a new species of Sciuruis, 106; description of a new species of Numenius, 192; new species of Geomys and Perognathus, 195; new species of Struthus, 196 ; a new species of Dipodomys, 224; a rnew species of Hesperomys, 240: By Dr. Leconte; Renmarks on Coleoptera from Arkansas and New Mexico, 58; Synopsis of the Anthicites of the United States, 71; Synopsis of the species of Pterostictis, 107 ; on the Coccinellidw of the U. S., and on a new species of Trombidium, 124; notice of fossil Dicotyles from Missouri, and on some fossil Pachyderins froam Illinois, I ; Hints towards a natural classification of the family Hlistrini,34; Synopsis of the Parnidw, of the, U. S., 34; Synopsis ofthe Eucnemida, of temperate N. America, 34; Descriptiou of a new species of Sciurus, 1477; Catalogue of Melyrides of the U. S., 147; Synopsis of the ScydmmnidT of the U. S., 148; Synopsis of the genus Geomys Raf., 148; description of 20 new species of Coleoptera of the U. S., 223; Synopsis of the Silphales of America north of Mexico, and Synopsis of the Scaphidilia of the U. S., 240; Synopsis of the species of Abrreus inhabiting the U. S., 241 ; Synopsis of the Meloides of the U. S., and Synopsis of the Endomychidae, Rhipiceridae and Cyphonid( of the U. S., 323; Description of new Coleoptera from Texas, 438: By C. Girard: Observations on N. American Astaci, 58; descriptions of new Nemerteans and Planarianis from the coast of Carolina, 325; Observations on the American species of Esox, and note on a nest constructed by Catfishes, 377; Researches upon Nemerteans and Planarians, 434: By Prof. Baird and C. Girard; On new Reptiles in the Museum of the Smithsonian Institution, 59, 117 and 148; description of new Reptiles collected by U. S. Expl. Exp., Capt. Wilkes, 171; description of new species of Reptiles from California, collected by Dr. Le Conte, 241 ; description of new fishes from the River Zuni, 326; description of Fishes collected in Arkansas by Capts. Marcy and McClelland, andl descriptions of Fishes collected by Mr. Clarke oa the U. S. and Mexican Boundary Survey, 379: By Dr. Hallowell; on new species of Reptiles from Western Africa, 58; descriptions of new Reptiles from Oregon, 172; on some new Reptiles inhabiting North

5 America, 172; on a new genus and two new species of Reptiles inhabiting N. America, 195; on a new genus and new species of African Serpents, 198; on new Reptiles from California, 225: By Prof. Dana; Crustacea of Expl. Exp., 59: By Dr. Leidy; on the Osteology of the head of the Hippopotamus, &c., 59; description of Bathygnathus borealis, 438. By Dr. Owen; notice of a Mineral from California, 72: By Dr. Genth, on some minerals which accompany Gold from California, 107; on Rhodophyllite, 118; on a probably new element with Iridosmene and Platir,um from California, 198; on a new variety of gray Copper, and on O wenite, a new mineral, 211: By the Rev. Mr. Longstreth; on the impregnation of the eggs of the Queen Bee, 34: By Mr. Cassin ; Catalogue of Halcyonidwe, in the Collection of the Acad. Nat. Sci., 172; on new species of Birds in the Collection of the Academy, 172; description of a new species of Scalops from Oregon, 241; Catalogue of Hirundinidar in the Collection of the Acad. Nat. Sci., and on new species of Swallows and Parrots in same collection, 326: Synopsis of the Falconidae of America north of Mexico, 439: By Mr. Tuiomey ; descriptions of fossil shells from the Tertiary of the Southern States, 192: By Dr. Heermann ; Notes on the Birds of California, 195; Catalogue of the Oological Collection of the Acad. Nat. Sci., 241 : By Mr. Conrad; description of new fossil shells of the United States, and remarks on the Tertiary Strata of St. Domingo and of Vicksburg, Miss., 196; Notes on Shells and descriptions of new species, 197; Synopsis of the N. American Naiades, 240; description of a new species of Unio, 315, and monograph of the genius Fulgur, 315; Monograph of the genus Argonauta, and synopsis of the genus Cassidula, and description of a new genus Athleta, 438; omissions and corrections to Syniopsis of North American Naiades, 438 : By Dr. Hoy; descriptions of Owls from Wisconsin, 197; Notes on the Ornithology of Wisconsin, 240: By Major Le Conte; on the Vines of N. America, 395; description of a new species of Pacane nut, 395; description of three new species of Arvicola, &c., 403; INDEX. V. Observations on Crotalus durissus and C. adamanteus, 404: By Dr. F. Greene ; on the chemical investigation of the remains of fossil Mammalia, 241: By the Rev. Mr. Berkeley and Rev. M. A. Curtis; on the Exotic Fungi from the Schweinitz Herbarium in the Acad. Nat. Sci., 242: By Lieut. Maury: Observations on Atmospheric Pressure, 304 : By Prof. Haldeman ; description of new species of lnsects, 325: By Dr. M. C. Read; Notes oil the Birds of northern Ohio, 395: By Professors Harvey and Bailey; Descriptioni of new species of Diatomacen, collected by 13. S. Exploring Exp., Capt. Wilkes, 430: By Dr. S. Weir Mitchell; On the influence of the Respiration on the Pulse, 435. Conrad, T. A., don. to mius., x%ii., xliv. Remarks on the Tertiary Strata of St. Domningo, and of Vicksburg, Miss., 198; Notes on Shells, 199, 320; Synopsis of the Naiades of North Armerica, 243; Monograph of the genus Fulgur, 316; Synopsis of the genus Cassidula and of a proposed new genus Athleta, 448; Omissions and corrections to Synopsis of N. A. Neiades, 449. Correspondents elected.- Antisell, Dr. Thos., New York Barry, Rev. A. C., Wisconsin, 403. Dalton, Dr. H. G., Dernerara, 124. Daniel, Dr. Wm. F., Africa, 146. De Candolle, Prof. Alphonse, Geneva, 324. Ford, Dr. H. A., Africa. 56. Foster, J. W., New York, 50. Fox, Rev. Charles, Michigan, 403. Hartlaub, Dr. G., Bremen, 315. Hartmann, Dr. Wm. D., Westchester, Pa., 373. boy, Dr. Philo R., Wisconsin, 403. Kennedy, Dr. H. W., Buenos Ayres, 195. Le Conte, Prof. John, Georgia, 458. Lynch, Commander Wm. F., U. S. N., 146. Maury, Lieut. M. F., U. S. Ni, Marsh, Dexter, Mass., 146. Newberry, Dr. J. S., Ohio, 403, Perley,M. H., St. John's, N. B., 171. Porter, Rev. Thos. G., Penna., 394. Potter, Rt. Rev. Alonzo, Penna Schaum, Dr. H., Berlin, 315. Smith, J. Broome, California, 195. Wagner, Prof. A., Munich, 315. Webber, Dr. Samuel, N. H., 30.

6 vi. INDEX. Whitney, J. D., New York, 50. Cotting, Dr. B. E., don. to lib., xlviii. Costa, Achille, don. to lib., lxviii. Cramer, Charles, don. to mus., lxi. Creot, Alfred, don. to mus., lxxii. Curators, Report of, for 1852, 218; for 1853, 456. Curtis, Rev. M. A.,dlon. to mus.,xvii., don. to lib., v. CLuttle, Johrn, don. to mus., i. Dalton, Dr. H. G., don. to mus., xvii. Dana, Prof. J. D., Conspectus of the Crustacea of the Exploring Expe(lition, Capt. Wilkes, 73. Daniel, Dr. Wm. F., don. to lib., xviii. Darlington, Dr. Wm., don. to lib., lxv. Daubree, Wim. A., don. to lib., xxiv. Dawson,J. W.,don. to mus.,lxiv.,don. to lib, lxviii. De la Berge, M., don. to mus., xxxv. Delafield, Dr. E., don. to lib., lii. Dowler, Dr. B., don. to lib.,xxx. Durand, Elias, don. to lib., iii. lxix. Ecole des Mines, don. by, of Annalesdes Mines, ix., xxxi., lv., lxix., lxxxi. Edwards, Amory, don. to mus., vii. Edwards, Mr., don. to mus., liii., Iviii., lxviii. Elwyn, Dr. A. L., don. to lib. xiii.; deposit in lib. xxxvi. Engelmann, Dr. Geo., don. to mus. xliv., lxiv. Eschricht, Dr. D. E., don. to lib. lxxvi. Fahnestock, G. WM., don. to mus. xxxvi., xliv., liii. Faraday, M., don. to lib. xv. Fisher, Dr. J. C., remarks orn the aurora borealis 51l; don. to lib. vi. Fisher, Thomas, don. to mus. i., xvii, xliv.; don. to lib. lxxiii. Flourens, M., don. to lib. lxxviii. Ford, Dr. H. A., don. to mus. i., lxviii.; on the characteristics of the Troglodytes gorilla, 30. Foster, J. W., don. to lib. I. Frazer, Prof., donl. to lib. lxxii. Gambel, Mrs., letter from, presenting the MSS. of the late Dr. Gambel, of his last overland journey to California, 439. Geological Society of London, don. to lib., ii., xiv., xxiii., xxiv., liv, lxvii., lxix., lxxv. Geological Society of Germany, don. to lib., lxxvi., lxxvii. Genth, Dr. F. A., don. to mus. xvii.; on some minerals which accompany gold in California, 113 ; on Strontiano-calcit6, 114; on Rhodophyllite, 121; on some salts of Cobalt and Ammonia. 147; on a probably new element with Iridosmine and Platinum from California, 209; on a new variety of Gray Copper, 296; or Owenite, 297. Germain, L. J., don. to mus. lxxii. Gibbes, Dr. R. W.. don. to mus. lxxiv.: don. to lib. lxxii.; letter from, presenting an aboriginal cranium from South Carolina, 433. Gibbons, Dr., don. to mus. lix. Gilliams, H., don. to mus. viii. Gilliams, J., don. to mus. xxxvi. Gillou, Constant, don. to mus., liii. Girard, Charles, don. to lib., vi., xxx., lxxii.; Revision of the North American Astaci, 87; description of New Nemerteans and Planarians from the Carolina Coast, 365; observations on a species of Rana, and of Bufo, from Oregon, 379; description of a supposed new species of Salmo,.380; remarks on Professor Agassiz' commucation on Cambarus Gambelii, &c., 380; on the American species of Esox, 386;. on a nest constructed by Catfishes, 387. Gistl, Dr. J., don. to lib. xxx. Graham, Col. J. D., don to lib. lvi. Grant, Wim., don. to mus. xvii. Greene, Dr. F. V., Chemical investigation of the remains of fossil Mammalia, 292. Gries, Wm., don. to lib. xxiii. Grube, Prof. E., don. to lib. lxxv. Haidinger, Wm., don. to lib. xlv., xlvi. Haldeman, Prof. S. S., don. to mus. xxvii., xxviii., lxiv., lxviii.; don. to lib. xxiii.; remarks on some albino specimens of Tamias Lysteri, 198; description of new species of insects, 361; proposition to change Meloc parvzcs to M. parvet/us, 404. Hallowell, Dr. E., don. to mus. lxxii.,

7 INDEX. vii. lxxiv.; on new reptiles frori Western Africa, 62; on some new reptiles inhabiting. N. America, 177; on new species of reptiles from Oregon, 182; on a new genus and new species of African Serpents, 203; on a new genus and niew species of reptiles inhabiting N. America, 206; on some new reptiles from California, 236. Hanley, M., don. to mus. viii. Harris, Edward, don. to mus. xvii. Harris, Mr., don. to mus. viii. Hartmann, Dr. Wm. D., don. to mus. i.) viii., xxvii.; don. to lib. lxii. Harvey, Profs. W. H., & J. W. Bailey, on new species of Diatomaceae, collected by the U. S. Exploring Expedition, Capt. Wilkes, 430. Hayes, Dr. Isaac, remarks on a tooth of the fossil Tapir, 53; don. to mus. i., vii., lxviii. Henderson, Dr. A., don. to mus. i., viii. Heermann, Dr. A. L., don. to mus., xxviii., xxxv., xxxvi., xliv., liii., lviii., lxiv.; Catalogue of the Oological Collection of the Acad. Nat. Sci, 313. Henry, Dr. T. Charlton, don. to mus., viii. Hiester, Dr., don. to mus. xvi. Hildreth, Dr. S. P., don. to lib., lxxvi. Historical Society of Penna., don. to lib., lxxiii. E3istoire Nat., &c., de l'ile de Cuba, don. of by members, xi., lxxxiii. Holmes, Prof. F. S., don. to mus., xxxvi.,, circular from 124. Hoopes, B. H., don. to mus., xliv. Hooper, John, don. to lib.,, xiii. Hopkins, Wm., don. to lib., xxiv. Horsfield, Dr. Thomas, don. to lib., xxviii., lvi. Hoy, Dr. Philo R., description of new Owls, from Wisconsin, 210; Notes on the Ornithology of Wisconsini, 304, 381, 425. Imperial Geological Instituite of Vienna, don. to lib., lxv., lxxvii. Jackson, Dr. Charles T., don. to lib., iii.,l1. Jackson, Dr. J. B. S., don. to lib., lxix. Janney, Dr. A., don. to mus., xvi. Jessup A., don. to mus., xvi., lix.. lxiv. Journal of the Indian Archipelago and Eastern Asia, don. of by editors, vii., xv., xxiv., xxxii., xxxvi., xlv., lviii., lxviii., lxix., lxxv. Kane, Dr. E. K., don. to mus., xvii., Iiii., lxviii., don. to lib., lxviii., lxxviii; announcement by, of a new Amer. Arctic Expedition, in search of Sir John Franklin, 196. Keefer, T. C., don. to lib., lix. Kennedy, Dr. H. W., don. to mus.. xxxvi., don.' to lib., xl., xlii., xliv. Kern, E. L., don. to mus., viii. Kern, R. H., don. to mus., vii., xxvii. Kilvington, Robert, don. to mus., viii., xvii., xxvii. King, Dr. A. T., don. to mus., lxiv. Kirtlanu, Dr. I. P., don. to mus., xxvii., lxviii. Kneeland, Dr. S., Jr., don. to lib., lx. Krider, John, don. to mus., i., xvii., xxvii., lix., lxviii., lxxv. Lambert, John, don. to mus., viii. Langstroth, Rev. L. L., don. to lib., lxix.; on the Honey Ant, of Mexico, 71; on the -impregnation of the eggs of the Queen -Bee, 49. Latham, R. T., don to lib., liii. Latour, M. Huguet, don. to lib., Iiii., liv., lv., lviii., lxi., lxiv. Lawrence, Geo. N., don. to mus. viii. Lea, Isaac, don. to mus., viii., xvii., lxxv., don. to lib., vi., ix., xxii.,; orn Dipsas plicatus Leach, 53; periodi- city of the family Unionidai, 54; description of a new species of Symphynote Unio, 54 ;,definition of the term "sspecies," 57; on some impressions of human feet in sandstone, from Illinois, 106; on some shells from the Drift, near Philadelphia, 106; description of a new species of Eschara, 109; notice of Mya nodulosa, 368; on the Castalia sulcata Krauss, and other Naiades, 376; on the Mulleria Ferussac, Acostcea D'- Orbigny, 435; on a specimen of Gneiss bored by Pholas dactylus, 438. Lea, L., don. to lib., xviii. Leasure, Dr. D., don, to lib.; xviii. Le Conte, Prof. J., don. to lib., lxxvi. Le Conte, Major John, don. to mus., viii., xvii, xxvii., liii., don. to lib., lvi.; enumeration of the Vines of N. America, 269; remarks on a specimen of Dipsas plicatus containing artificial pearls, 326; description of a new species of Pacane Nut, 402; description of nine new species of Arvicola, with remarks on' other North American Rodents, 404; observations

8 viii. INDEX. on the so-called Crotalus durissus, and C. adamanteus of authors, 415. Le Conte, Dr. John L., don. to mus., 1., vii., viii., xvi., xxvii., xliv.; don. to lib., lxvi.; oni some fossil Suiline Pachyderms, from Illinois, 3: notice of a fossil Dicotyles, from Missouri, 5; on the difference between primor- ;dial and introduced races, 35; on a natural classification of the Histrini, 36; synopsis of the Parnida of the IUnited States, 41; synopsis of the Eucinemides of temperate N. America, 45; remarks on a new locality for Casteroides Ohioensis, 53; on some fossil Pachyderms, from Illi-! nois, 56; on some Coleoptera, from Missouri and New Mexico, collected by Dr. Woodhouse, 65; synopsis of the Anthicites of the United States, 91; on the Coccinellidae of the U. States, 129; description of a new species of Trombidium, 145; descrip-! tion of a new species of Sciurus, 149; synopsis of the Scydmenidee of the United States, 149; attempt at a synopsis of the genus Geomys Raf., l 157; Catalogue of the Melvri(les of 1 the United States, 163; remarks on! the genus Dipodomys, 224; on the.mexican Ant, 225; descriptions of twenty new species of Coleoptera inhabiting, the United States, 226; synopsis of the Silphales of America, north of Mexico, 274; synopsis of the species of Abraeus inhabiting the U. States, 287; remarks on the specimens of Scalops in the collection of the Academy, 326; synopsis of the Meloides of the U. States, 328; synopsis of the Atopidae Rhipiceridai and Cyphonidae of the United States, 350; synopsis of the Endomychidne of the United States, 357; description of new Coleoptera from Texas, collected by the Mexican Boundary Commission, 439. Leidy, Dr. Joseph, don. to mus., xxvii., lxviii.; don. to lib., v., xviii., xxvili., liv.,lv., lix., lxii., lxvii.; remarks on a fossil vertebra, from Ouachita, La., 52; osteology of the Hippopotamus, 52) 53; on the fossil Tortoises, from Nebraska, 59; on " Red Snow," from the Arctic regions, 59; on two crania of extinct species of Ox, 71; on the Honey Ant, of Mexico, 72; reference to a fossil tooth of a Tapir, 106; remarks on the fossil Ox, 117; remarks on the fossil Edentata of N. America, 117; remarks on some fossil teeth of Rhinoceros, from Nebraska, 2; on a fossil Turtle, from Nebraska, 34; remarks on a fossil Delphinus, from the Miocene of Virginia, and a fossil Crocodilean reptile, from New Jersey, 35; remarks on Tapirus Haysii, 148; remarks on various fossil teeth, 241; on some fossil fragments from Natchez, Miss., 303; observations on remains of extinct Cetacea, from the green sand of New Jersey, and from South Carolina and Virginia, 377; remarks on a collectioni of fossil Mammalia and Chelonia, from the Mauvaises Terres of Nebraska, 392; remarks on a fragment of a jaw of an extinct Saurian, from Prince Edward's Island, 404: character explained of nodular bodies found in the tails and fins of fishes, from Cold Pond, N. H., 433. Le Gal, E., don. to lib., xiv. Lepsius, Dr. R., don. to lib., xxxi. Letters from Individuals- Adams, Com., U. S. N., 71. Bache, Prof. A. D., 105. Baird, Prof. S. F., 438. Barry, Rev. C., 433. Bischoff, Dr. G. G., 147. Blanding, Dr. Wm., 240. Boue, Dr. M., 435. Boyd, Lieut., U. S., Chambers, Dr. R. C., 241. Costa, Sig. Achille, 325. Cresson, Prof. J. C., 323. Curtis, Rev. M. A., 105. Daniel, Dr. Wm. F., 71. Davis, J. Barnard, 395. Dawson, J. W., 325. Ducachet, Rev. Dr., 71. Dunglison, Dr. R., 240. Durand, E., 191. Edwards, Amory, 52. Ehrlich, Prof., 125. Espinoza, Signor Juan, 324. Fahnestock, G. W.,' 147. Ford, Dr. H. A., 375. Fox, Rev. Charles, 433. Frazer, Prof. J. F., 223. Gibbes, Dr. R. W., 403. Gilman, Charles, 438. Gibbons, Dr. H., 304. Gistl, Dr. J., 117. Grube, Prof. E., 433. Haidinger, Wm., 189. Hamilton, James M., 378. Hartlaub, Dr. G., 325. Hoy, Dr. Philo R., 404. Kane, Hon. J. K., 438.

9 INDEX. ix. Kennedy, Hon. J. P., 223. Kennedy, Dr. H. W., 196. Kirkbride, Dr. T., 172. Kirtland, Prof. J. P., 117. Lapham, J. P., 223. Laporte, M., Sr., 125J Lawson, Thomas, U. S. A., 51. Lea, Isaac, 325. Lepsius, Prof., 118. Marsh, Dexter, 195. Maury, Lieut. U. S. N., 304. Marston, Com'r. U. S. N., 433. McCluney, Capt. U. S. N., 59. Merrick, S. V., 378. Miller, Jacob S., 304, Moore, Wm. E., 433. Ord, George, 1. Paine, Dr. Martyn, 172. Peale, T. R., 1. Perry, Commodore, U. S. N., 58. Prescott, Wm. H., 58. Potter, Rt. Rev. Alonzo, 196. Ravenel, H. W., 323. Retzius, Prof. A., 71. Sheafer, P. W., 323. Shumard, Dr. B. F., 1. Troschel, Dr. F. H., 56. Tschudi, Dr. J. J., 434. Wagner, Dr Webber, Dr. Samuel, 51, 433. Wood, Richard D., 375. Letters from Societies, &c.- Acad. C. L. C. Nat. Curiosorum, 192, 240, 303, 433. Acad. of Sciences, Belles Lettres, &c., of Lyons, 375. Advocates' Library, Edinburgh, 195. Agricultural Soc. of Lyons, 375. Albany Institute, 240. Amer. Acad. of Arts and Sciences, 107, 325. Amer. Philosoph. Soc., 1, 51, 117, 147, 240, 323, 326, 395, 433. Asiatic Soc. of Bengal, 189. British Museum, 53, 105, 189. Ecole des Mines, 303. Faculty of Harvard University, 53. Geological Soc. of London, 34, 107, 223. Geolog. Soc. of Germany, 403. Historical Soc. of Penna., 315, 404, 435. Imperial Geolog. Institute of Vienna, 323, 435. Leeds Literary & Philosoph. Society, 172. Linnean Soc. of London, 51, 124. Linnean Soc. of Lyons, 375. Lyceum of Nat. History of N. York, 5S, 316, 403. Manchester Library & Museum, 172. Naturwissen. Verein in Hamburg, 172. Naturwissen. Verein in Halle, 195. New York State Library, 1, 34, 72, 107, 147, 172, 196, 240, 323, 325, 395, 403. Royal Acad. of Sci. of Brussels, 59, 324. Royal Acad. of Sci. of Naples, 56, 325. Royal Acad. of Sci. of Stockholm, 34, 303, 435. Royal Acad. of Sci. of Vienna, 56, 189, 323, 433, 435. Royal Acad. of Sci. of Amsterdam, 303, 381. Royal Bavarian Academy, 379, 433, 437. Royal Asiatic Soc. of London, 240. Royal Geograph. Soc. of London, 241. Royal Geograph. Institute of Vienna, 435. Royal Mineralog. Society of St. Petersburg, 403. Royal Soc. of Sciences of Liege, 172. Smithsonian Institution, 51, 71, 107, 225, 303, 323, 434. Theological Society of London, 172. Troy, (N. Y.) Young Men's Association, 303. Wurtemburg Soc. of Sciences, 324, 433. Zoological and Botanical Soc. of Vienna, 437. Le Vaillant, Gen., don. to mus., xxxv. Lewis, Dr. F. W., don. to mus., lviii. Lewis, Dr, Samuel, don. to mus., xliv. Librarian, Report of for 1852, 216; for 1853, 455. Linnean Society of London, don. to lib., xxxiii., lxxvi. Linnean Soc. of Lyons, don. to lib., lxix. Lyceum of Nat. History of New York, don, to lib., xxxii., xxxvi., lxvii., lxx., lxxiii. Lyell, Sir Charles, don. to lib., xxxix. Lynch, Commander W. F., don. to lib., xxxii. Mantell, Gideon A., don. to lib., xxxii. Marston, Capt., U. S. N., don. to mus., lxxiv. Maury, Lieut. M. F., observations on atmospheric pressure, 313. Maximilian, Prince de Wied, don. to lib., xiii., lxix. 2

10 X. INDEX. McAndrew, Mr., don. to mus., viii., xxxv. McCall, Col. G. A., don. to mus., xliv., lxiv.; on Carpodacus familiaris, &c., 61. McEuen, Dr. Thomas, announcement by, of decease of J. Price Wetherill, 376. Mears, James, don. to mus., Ixiv. Meigs, Dr. C. D., don to mus., xvi., lxiv.; don. to lib., lxx.; remarks on the structure of the uterus of the Porpoise, 316. Members elected:- Agnew, Wm. G. E., 324. Allen, J. M., M. D., 70. Ashhurst, Lewis R., 324. Benton, Dr. Charles C., 322. Biddle, Henry J., 146. Biddle, Dr. John B., 458. Biddle, Thomas, 324. Bischoff, Dr. G., 124. Boller, Henry J., 70. Booth, Prof. J. C., 171. Brown, David S., 324. Brown, John A Brown, Joseph D., 324. Budd, Dr. C. H., 56. Buckley, Edwar(d S., 105. Bullitt, John C., 376. Camac, Dr. Wm., 70. Claghorn, James L., 124. Collet, Dr. M. W., 171. Collins, Percival, 403. Corse, Dr. James M., 195. Cresson, Prof. J. C., 322. Da Costa, Dr. J., 50. Draper, Edmund, 324. Dunglison, Dr. R., 239. Durand, Elias, 70. Ducachet, Rev. Dr., 70. Edwards, Amory, 56. Emerson, Dr. G., 394. Fahnestock, G. W., 146. Farnum, John, 324. Fisher, Charles Henry, 324. Fisher, J. Francis, 324. Gardette, Dr. E. B., 324. Genth, Dr. F. A., 70. Graff, Frederick, 324. Greene, Dr. F. A., 171. Grigg, John, 324. Griffith, R. E., 171. Hallowell, Morris L., 324. Hanson, H. Cooper, 302. Hewson, Dr. Addinell, 239. Hopkinson, Dr. Joseph, 50. Hutchinson, J. Pemberton, 324. Jeanes, Joseph, 324. Keim, George M., 124. Lang, Dr. Edmund, 322. Lea, Joseph, 116. Lea, Thomas T., 324. Lesley, Peter, 373. Lewis, A. J., 324. Lippincott, Joshua B., 373. Logan, Dr. J. Dickinson, 315. Meias, Dr. J. Aitken, 70. Meigs, Dr. J. F., 70. Mercer, Singleton A., 324. Merrick, Samuel V., 324. Meyers, John B., 324. Mitchell, Dr. S. Weir, 403. Morris, Jacob G., 70. Page, Dr. Wm. B., 322. Pepper, Henry, 324. Phillips, Dr. Dinwiddie B., 188. Platt, William Price, Richard, 324. Remington, Thomas P., 324. Sanderson, Edward F., 403. Schaffirt, F., 315. Seal, Thomas F., 105. Sequard, Dr. E. Brown, 146. Sharpless, Caspar W., 30. Sheafer, P. W., 315. Struthers, William, 50. Swift, Joseph, 324. Taggart, Dr. Wm. H., 322. Tingley, Dr. H., 116. Trautwine, J. C., 70. Welsh, William, 324. Whelen, Edward S., 373. Wood, Richard D., 324. Wytbes, Rev. Joseph H., 437. Yeager, George, 70. Merrick, John, don. to lib., xi.; don. to mus., ixxiv. Mitchell, Dr. J. K., don. to lib., ii. Mitchell, Dr. S. Weir, on the influence of some states of Respiration on the Pulse, 435. Moore, Isaac W., don. to mus., viii. Morris, Miss M., don. to mus., lxviii. Morton, Mrs. Dr., don. to mus., i. Morton, Dr. T. G., don. to lib., Ixii. Naturwissenschaftliche Verein in Hamburg, don. to lib., xlii. Naturwissen. Verein in Halle, don. to lib., 1. Newcomb, Dr. W., don. to lib., lxviii. Norris, 0. A., don. to mus., lxxiv. Officers for 1853, 221; do. for 1854, 458. Oliver, Dr. Geo. P., don. to mus., xliv-.

11 INDEX. xi. Owen, Dr. D. D., don. to mus., xxvii., xliv.; don. to lib., liv.; remarks on human foot prints in limestone, 106; notice of a new mineral from California, 108; remarks on Fusilina limestone and Tutenmergel, 1 18; remarks on his geological map of Wisconsin, Iowa and Minnesota, 189; communication in relation to his description of a supposed new Earth, 379. Ord, George, don. to lib., ix., xix., xxii., xxviii., lix., lxiv. Page, Geo. W., don. to mus., lxiv. Paine, Dr. Martyn, don. to lib., xl. Pearsall, Robert, don. to mus., vii. Peirce, Jacob, reference to a Hybrid between the Peacock and Guinea Fowl, 50. Penna. Farm Journal, don. of, by Editors, ii., ix., xi., xiv. Perley, M. H., don. to lib., xxxiii. Peterson, R. E., don. to mus., xxviii. Phillips, John, don. to mus., viii., lxxv. Piddington, Henry, don. to lib., lix. Powel, Samuel, don. to mus., vii., xxxvi., lxxiv. Prescott, Wm. H., don. to lib., xiv. Proceedings, Committee on, Report by, 219. Publication Committee, Reports by, 28, 238; announcement by, of publication of Part 2, Vol. 2, new series of Journal, 29; do. of Part 3, 225; don. to lib., vi. Quetelet, M. A., don. to lib., xv. Rand, Dr. B. H., don. to mus., xxvii., lxiv., lxviii.; don. to lib., lv., lxvii. Ravenel, H. W., don. to mus., lxviii.; don. to lib., lxvi. Read, Dr. M. C., Catalogue of the Birds of Northern Ohio, 395. Recording Secretary, Report of for 18,5l, 28; do. for 1852, 214; do. for 1853, 453. Regents of the University of State of New York; don. to lib., lxi., lxix., lxx. Reports of Committees: on Dr. Leidy's paper on the Hippopotamus, 70; on Mr. Lea's description of a fossil, Saurian from the new Red Sandstone of Penna., and on some new fossil Molluscs, &c., 105; on Dr. Le Conte's Synopsis of genus Pterostichus, 116; on Dr. Owen's description of a new Mineral and a new Earth, 3; on Dr. Heermann's notices of California Birds, 197 ; on a paper by the Rev. Drs. Berkeley andl Curtis, on the Exotic Fungi from the Schweinitzian Herbarium, 302; on Mr. Conrad's description of a new species of Unio, 316; on Mr. Girard's "1 Researches on Nemerteans and Planarians, 435; on Dr. Leidy's description of Bathygnathus borealis, 448; on Mr. Conrad's Monograph of Argoniauta, &c, 448. Report of Committee appointed io confer with Dr. Kane on the subject of his proposed American Arctic Expedition, 196. Report of Committee appointed to collect subscriptions for enlarging the Hall, 238. Report of Committee appointed to procure funds for the purchase of the Anatomical Collection of the late Dr. S. G. Morton, 321. Resolutions; to present a copy of the Proceedings to Dr. H. A. Ford, of Liberia, 55; to appoint a committee to communicate with Com. Perry in relation to makingf collections in India by the U. S. Expedition, 55; of thanks to Major Le Conte for his Herbarium of N. A. Plants, 58; inviting the State Medical Society to visit the Museum, 105; giving to subscribers of $100, and upwards, to the fund for enlarging the Hall, the right during life to visit the collections and give orders of admission to Museum, 28; directing the income from the Stott legacy to be applied to the Jouirnal fund, 30: in. reference to Dr. Ruschenberger's "Notice of the Academy," 33; appointing a Committee to confer with Dr. Kane in relation to his proposed Arctic Expedition, 196; urging upon Congress an appropriation for the geological survey of Oregon and the Mauvaises Terres of Nebraska, 239; directing a special meeting of the Academy to consider the expediency of erecting a new Hall, 321; in relation to latter, 323; of thanks to Chas. Henry Fisher and Thos. Biddle, 32.5; of thanks to W. S. Vaux, Dr. C. D. Meigs and John Cooke, 324; in reference to the decease of S. Price Wetherill, 376; granting the privilege

12 Xii. INDEX. of endorsing tickets of admission to Museum to Mrs. Maria K. Wetherill, 457. Retzius, Prof. A., don. to lib., xix. Richardson, Dr. John, dorn. to lib., xix. Riddell, Dr. J. L., don. to lib., xxxii. Roberts, Percival, don. to mus., viii. Robinson, John, don. to mus., xxvii. Robinson, Ludlow, don. to rnu., xxviii. Royal Acad. of Sciences of Brussels, don. to lib., xv., lxvi. Royal Acad. of Sci. of Liege, don. to lib., lxxvii. Royal Acad. of Sci. of Madrid, don. to lib., lxx. Royal Acad of Sci. of Stockholm, don. to lib., lix. Royal Acad. of Sci. of Vienna, don. to i lib., xiii., xlv. Royal Bavarian Academy, don. to Jib., lxix., lxxi., IXxvi. Royal Mineralog. Soc. of St. Petersburg, lxxiii. Royal Saxon Soc. of Sciences, don. to lib., lxxvii. Royal Soc. of Edinburgh, don. to Jib., vi., lxxv. Ruschenberger, Dr. W. S., "1 Notice of the Acad. Nat. Sci. of Philada.," read by, 33; don. to mus., i.. xliv., liii., lxx. Say Mrs.Lucy W.,don.ton mus. xxvii. Saussure, H. F. de, don. to lib., lvi. Senseny, Dr., don. to mus., xliv. Sergeant, J. D., don. to mus., viii., xliv. Sharpless, Dr., don. to mus., i. Sheafer, P. W;, don. to lib., xlii. Shumard, Dr., don. to mus., xxxvi. Silliman's Journal, don. of, by Editors, ii., ix., xviii., xxviii.. xxxvi., Xlv., liii., lx., lxiv., lxix., lxxii., lxxvi. Smith, Aubrey H., don. to mus., xvii., xxxvi. Smith, Charles E., don. to mnus., xxxv., don. to lib., xviii., xlvi., lxiii. Smithsoniian Institution, don. to mus., lxxiv.; don. to lib., xxviii., lvi., lix., lxii., lxviii., lxix. Societ:e d'agriculture du Bas-Canada, don. to lib., vii., ix., xiv., xxii., xxviii., xxxii., xxxix., liii. Society of Arts, &c., of London, don. to lib., lxiii., lxv., lxvii., lxix., lxx., lxxvi., lxxviii., lxxx. Societe de Physique et d'hist. Nat. de Gen6ve, don. to lib., xlvi. Societe des Sciences de Neufchatel, don. to lib., lxvi. Soci6t& Nat. des Sciences de Lille, don. to lib., xxxii. Societe Nationale d'agriculture, &c., de Lyon, don. to lib.; lxix. Societa Reale Borbonica Academia delle Scienze, don. to lib., lxvii. Societe Royale des Sciences de Liege, don. to lib., xlii. Spackman, Dr. Geo., don. to mus., xxxv. Squier, E. Geo. don. to lib., xlvi. Stansbury, Capt. Howard, don. to lib., xxxiv. Stewardson, Dr. T., don. to mus., xvii. Storer, Dr. D. H., don. to lib., lxvi. Strickland, H. E., don. to lib., xxiv., xxxviii., xlix. Struthers, Wm., don. to mus., xvii. Taylor,.., don. to mus., liii. Thomas. Dr. R. P., don. to mus., lxxii. Trautwine, J. C., don. to mus., xliv. Troschel, Dr. F. H., don. to lib., xiv., lxvi. Trustees of New York State Library, don. to lib., xxiii., lxi. Tschudi, Dr. J. J., don. to lib., lxxvii., Tuomey, M., description of fossil shells from the Tertiary of the Southern States, 192. Turnbull, Dr. L., don. to lib., xlv. Updegraff, Dr. J. J., don. to mus., vii. U. S. Departments, don. to mus., xxxv., lx., lxxiii., lxxviii.; don. to lib., xxii., xxviii. Vaux, William S., don. to mus., xxxvi., lxviii. Verreaux, M. Jules, don. to mus., viii., xxxv. Virginia Med. and Surg. Journal, don. of, by Editors, lxvii., lxix., lxxii., lxxiii., lxxviii. lxxi., Warren, Dr. J. C., don., to mus., lxxv. Watmough, J. H., U. S. N., don. to mus., xxxvi. Watson, J. G., don. to mus., xvi. Watson, Dr. G., don. to mus., xxvii., liii., lix., lxviii., lxxv. Watson, Lieut.) U. S. N., don. to mus., I ix.

13 INDEX. xiii. Webber, Dr. Samuel, note from, accompanying fresh water fishes containing nodular bodies embedded in the fins and tail, 118; don. to mus., lxxii. Wells, D. A., don. to lib., xvii. Western Acad. Nat. Sciences, don. to lib., lvi. Wetherill, J. Price, don. to mus. i.; announcement of decease of by Dr. Mc- Euen 376. Wetherill, Dr. Charles M., don. to muis., xxvii.; don, to lib., lxvi., lxix., lxxvii. examination of Molybdate of Lead from Phcenixville, Pa., 55, 119; Chem. investigation of the Honey Ant, 111; Chemical examination of the foodl of the Queen Bee, 119; analysis of the Cotton Plant and Seed, by T. L. Sumner, communicated by Dr. Wetherill, 212; remarks on iron crystallized from slag, 434. Wheatley, Chas. M., don. to mus., xxxvi., liii., lix. Whitall, Mrs. M., (Ion. to lib.. xl. Williams, Henry J., don. to lib., lxviii. Wilson, Dr. T. B., don. to miis., i.> vii., viii., xxxvi., xliv., lxviii.; don. to v. ii., 11., xvi., xviii., xix., xxii., xiv., XV.,i XV1., XY111., XIX., Xx{11S XXII1. xxiv., xxviii., xxxi;, xxxii., xxxiii., xxxvi., xxxvii., xxxviii., xxxix., x1i., xlii., xlv., xlvii., xlviii., xlix., li., liv., lv., lvi., lviii., lix., lxi., lxii., lxiii., lxv. lxvi., lxvii., lxix., lxx., lxxi., lxxii., lxxiii., lxxvi., lxxvii., lxxviii. Wilson, Edward, don. to mus., xxvii., xxviii., xxxv., xxxvi, xliv.; don. to i uii., xix., v., vi.x xi., xii., xiv., xv111., X1X.> XX.7 :Xxi. XXI1., XX1V., xxv, xxvi., xxvii., xxviii., xxix., xxx., xxxi., xxxiii., xxxiv., xxxv., xxxvii., xxxviii., xxxix., xl., xli.. xlii., xliii., xlv., xlvi., xlvii., xlviii., xlix., I., li., lii., Iiii., liy., 1Y., ]vi., lvii., lviii., lix., lxi., lxii., lxiii., lxv., lxvi., lxx., lxxi., lxxiii., lxxiv. Winthrop, Mr., don. to mus., lxviii. Wisconsin Nat. Bist. Society, don. to mus., lxxv. Wistar, Dr. Caspar, don. to mus. i. Wood, Prof. Geo. B., don. to lib., lx. Wood, Wm., don. to mus., xvi., liii., lviii., lix. Woodhouse, Dr. Samuel W., don to mus.,viii., xxvii., xliv.; on new species of Vireo and Zonotrichia, 60; description of a new species of Ectopistes, 104; description of a new species of Sciurus, 110 ; description of a new species of Numenius, 194; de3- cription of a new species of Perognathus, 200; description of a new species of Geomys, 201 ; tlescription of a new species of Struthus, 202 change of name of Sciurus dorsalis to S. Aberti, 220; description of a new species of Hesperomys, 242. Wurtemberg Society of Sciences, don. to lib.* lxvi., lxxvi. Yarnall, Ellis, Jr., don. to mus., lxxii. Zoological and Botanical Society of Vienna, don. to lib., lxxviii.

14 1852.] 3 January 13th. Vice-President WETHERIL in the Chair. Dr. Leidy presented an additional portion of Mr. Dana's communica tion on the Crustacea of the late American Exploring Expedition; which was referred as before to the original Committee. Mr. Wetherill stated that the Phosphate of Lime, a specimen of which he presented this evening, was being much used for agricultural purposes, after being decomposed by the action of sulphuric acid. Mr. Wetherill also stated that the Adipocire, also presented this evening, was the result of decomposition of the bodies of a number of sheep, which had been buried fifteen years since in a wet soil, on a farm in an adjoining county. Dr. Leidy, referring to the Cretacean remains characterized by him at the meeting of December 9th, remarked that they were the first relics of Mammals that have been found in the Cretaceous Group. On leave granted, the Committee to which was referred Dr. D. D. Owen's paper describing a new Mineral and a new Earth, presented a report, recommending the same for publication in the forthcoming No. of the Journal, which was adopted. January 27th. MR. ORD, President, in the Chair. The Committee, to which was referred the following papers of Dr. Le Conte, reported in favor of publication in the Proceedings. Notes on some Fossil Suiline Pachyderms from Illinois. By JOHN L. LE CONTE, M. D. DICOTYLES DEPRESSIFRONS. Hyops depressifrons Lec. Am. Journ. Sc. 2d series, Vol. 5, 103 (1848.) After a careful comparison of the fragments of this animal with Dicotyles torquatus, I have come to the conclusion that the differences are by no means of such a nature as to admit of the formation of a peculiar genus. The differences in the cranium which distinguish this animal from D. torquatus are: 1st, the greater depression of the front; 2d, the greater expansiorn and less sudden declivity of the malar plates; 3d, the less convex nasal bones. In consequence of this last character, the groove running forward from the frontal foramen is more or less superior in its whole extent and never Iateral, as in the anterior part of the head of D. torquatus. The lower part of the skull and the anterior part of the nose are broken away, so that no teeth remain in the fragment. Accompanying this fragment are four teeth from the upper jaw, which differ from the corresponding teeth of Platygonus compressus Lec., from the same locality, by having the transverse ridges more distinctly connected with the basal margin; this is especially the case at the posterior margin; the ridges also show a tendency to unite together, and thus the transverse valley is rendered a little narrower than in Platygonus. In all these points the teeth agree exactly with Dicotyles torquatus, and on a careful comparison nothing worthy of notice, even as a specific difference, could be detected. A part of the socket of the left superior canine, with the adjoining portion of the palatal plate, shows no difference on comparison with D. torquatus.

15 4 [JANUARY, The base of the inferior left canine was found in its socket; the remainder was found broken; the fragments were put together so as to make almost a complete tooth, which presents no specific characters of any importance; the anterior rnargin is more rounded than in D. torquatus, and the grooves on the posterior, external, and internal faces of the fang are deeper; the young of D. torquatus in the depth of the grooves agrees perfectly with our fossil, which, however, from the wearing of the tooth, must have been an adult. The condyloid process of the riaht lower jaw was found broken off just below the neck; in comparison with D. torquatus, it is less concave in its external outline, and there is a slight depression externally just below the end of the articular suirface; the posterior face a little below the articular part is more compressed and less flattened than in D. torquatus. The inferior extremity of the humerus is perforated; the articular faces are in no respect different from those of D. torquatus. The same is the case with the innominatum and the femur. Of the left posterior foot is preserved the calcancum, the outer metatarsal, the first and second phalanges of the outer toe and the first phalanx of the inner toe; all these bones completely resemble the corresponding parts of D. torquatus. As compared with Platygonus compressus, the calcaneum shows important characters, which may be used in separating the bones of these animals, if they should again be found mixed together. In Platygonus the astragalian face is not distinctly defined at its supero-external part, but is confluent with the depression existing in that part of the bone behind the fibular process. In Sus and Dicotyles this face is distinctly separated from the valley between the two processes, and the inferior part of the astragalian process is much less thickened than in Platygonus; the whole bone is more slender and less flattened than in Platygonus. My reasons for considering the cuboides figured by me* as belonging to Platygonus, are as follows: From teeth there was evidence of two specimens of Platygonus of different agres; portions of three calcaneal bones of the left side were found, two of which were precisely similar; the third is the one here mentioned as belonging to Dicotyles. The larger of the two similar bones fitted perfectly with the extremity of a tibia, an astragalus and a cuboides forming a considerable portion of the tarsus; to this cuboides, however, the met tarsal bone above described catnnot be acdapted. This will be the proper place for correcting an importint error in the memoir on Platygonus already quoted: on page 270, pl. 4, figs. 23 and 24, is represented what was considered the inner metatarsal. On comparison this bone is found to correspond accurately with the inner right metacarpal of Dicotyles; there are two specimens of this bone, differing slightly in size, and the smaller one of which has lost its lower extremity, and evidently belonged to a young animal. We have therefore the same reason to refer this to Platygonus as the tarsal bones above mentioned. I should also notice here, that the superior canines of very young Dicotyles resemble very closely those of Platygonus, but are not so much compressed, and have only a single angulated line at the anterior part of the base of the tooth. On account of the very strong resemblance between the dentition of Platygonus and Dicotyles, I am inclined to consider the former as rather Suiline than Tapirmid in its affinities; the undulated outline of the lower jaw in the Dicotyles group, reaches its maximum in the great dilatation of the angle of the jaw in Platygonus; the compression of the canines is carried to a gfreater degree than in any other genus, and the molar stlruetuire is reduced to the simplest Pachydermal form by the absence of all accessary tubercles. The dimensions of the fragments of Dicotyles depressifrons indicate an animal * Memoirs Am. Acad. of Science and Arts, New Series, Vol. 3, pl. 4, figs. 25, 26.

16 1852.] 5 a little larger than the adult D. torquatus; the only measurements that can be given are the following, in English inches: Distance between the frontal foramina 1'2. Third premolar: lateral diameter *45: antero-posterior diameter *4. Fourth premolar: lateral diameter '46: antero-posterior diameter *5. First molar: lateral diameter '55; antero-posterior diameter *63. Inferior canine: length 3'75; posterior breadth '48; radius of curvature 2'75. Humerus: diameter of inferior extremity 1 52; breadth of larger articular groove,.75; smaller groove *4; least distance from lower margin of larger groove to foramen *67. Innominatum: diameter of acetabulum 12; least breadth of ilium 10. Femur: length 6-85; from fovea on head, to extremity of trochanter major 1'72; breadth of tibial articular groove anteriorly '8; transverse diameter of condyles posteriorly 1'55. Metatarsal: length 2'87; of inferior articular surfaces, lateral diameter '46; antero-posterior diameter '57; length of first phalanx 1'25; second phalanx '95. Calcaneum: length 2'45: greatest breadth 1 12; from fibular to apical process '91. Condyle of lower jaw; breadth 12; antero-posterior diameter of articular surface *6. PROTOCH(ERUS PRISMATICUS Lec. Am. Journ. Se. 2nd series 5,105. To the description of the teeth of this animal, I have only to add that the fang of the canine is very similar to that of Sus babiroussa; the posterior molar bears considerable resemblance to that of Sus babiroussa, as represented by Blainville, (plate VIII.) although the student will fail to find the resemblance in nature. The Anthracotherium tooth figured in Owen's Odontography, with which I formerly compared this tooth, differs in having the lobes connected by an elevated ridge. The dimensions of the teeth are as follows, and indicate an animal smaller than a Peccary. Inferior canine: length of worn surface 135; breadth '3 ; radius of curvature of posterior face and margin 2*46. First inferior molar: lateral diameter '39; antero-posterior diameter 652. Last inferior molar: breadth '5, from posterior lobe to middle lobe *26; to summit of anterior lobe '58. Notice of fb fossil Dicotyles from Ml1issouri. By JOHN L. LE CONTE, M. D. The Tooth which forms the subject of this communication, was found with some mastodon bones in Benton County, Missouri, and was presented to me by Dr. R. W. Gibbes. It is a right lower canine, wanting the fang, and attached to a small piece of jaw, containing alveoli of three incisors. The tooth has precisely the same direction as in D. torquatus, but is somewhat less compressed; the anterior edge is very acute; on the part of the fang which remains, no vestige of external and internal grooves exists; the posterior groove is well marked as in D. torquatus; on the outer surface of the tooth, nearer the posterior than the anterior margin is an elevated ridge, acute at summit, which extends along the whole of the enamelled part of the tooth. This character is not to be found in D. torquatus; the very obsolete elevation which exists there being a consequence of the continuation of the grooves impressed on the internal face of the fang; I have also failed to discover a similar elevated line on the canine of any species of Sus which has come under my observation. As this seems to be a character of sufficient importance to separate the species co-existent with the Mastodon, from any now living, I would give to it the name of Dicotyles costatus. Although there is no character in this canine to make a reference to Dicotvles more certain than to Sus, yet as the latter genus has not been distinctly proved to

17 6 [JANUARY, have inhabited this continent, and as in the existing creation Dicotyles is the true equivalent of Stis in America, the probability of our very distinct fossil species belonging to Dicotyles is much increased; this probability is rendered almost certaia, when we consider that remains of true Dicotyles have been found in Illiaois in company with other singular forms, (Platygonus and Anomodon) which by their great peculiarities would seem to indicate a period anterior to that of the Mastodon. The measurements of the canine are: length of enamelled surface along anterior curvature 2 2; breadth of posterior surface *37; radius of curvature of posterior edge 2 0; of anterior edge 2*1. The Committee to which was referred Mr. Dana's papers on the Crustacea of the Exploring Expedition, reported in favor of publication in the Proceedings. Conspectus Cruestaceorum, fc. Conspectus of the Crustacea of the Exploring Expedition under Capt. Wilkes, U. S. N. By JAMES D. DANA. PAGURIDEA, continued, and Subtribe MEGALOPIDEA. I. PAGURIDEA, continued. Among the species of the genus Pagurus, as restricted in my former paper on the Paguridea, there are still three groups of distinct character ; one, having no trace of a beak, the front being truncate, and also having the fingers opening in a vertical plane, the hands being usually compressed, with commonly the left the larger; a second, having a short beak or triangular point in front, and the fingers opening like the preceding, with the hands subequal; a third, having a beak like the last, but the fingers opening in a horizontal plane, the hands being subequal -and more or less depressed, and never compressed. The first group has Pagurus punctulatus for its type; the second, P. aniculus ; the third, P. clibanarius. They form three genera with the following characters: 1. PAGUPus.-Frons non rostratus, truncatus. Manus anticre sapius compressm, interdum suboeque, sxpius sinistrfa majore, digitis apice corneis, in plano verticali claudentibus. 2. ANICULUS, D.-Frons triangulate' rostratus. Manus antice subaqua, digitis apice corneis, in plano verticali claudentibus. 3. CLIBANARIUS, D. -Frons triangulate rostratus. Manus anticw sub2que, plus minusve depresse, digitis apice corneis, in plano horizontali claudentibus. Species P. cequalis, zebra, humilis, globosi-manus, Clibanario pertinent. The species Pagurus aniculus may hereafter be named AnienJus typicus; the P. clibanarius, Clibanarius vulgaris; and the P. Bernhardus, Bernhardus streblonyx. The name Bernhardus pubescens, (see preceding volume, p. 270,) we propose to change to B. scabriculus, as Kroyer* has described a Pagurus pnbescens, which is probably a Bernhardus. Descriptiones Pagztrideorum adhuc inedite. BIERNHARDUS OBESI-CARP.us.-Frons medio prominulus, obtusus. Regio carapacis antica paulo transversa, nudiuscula. Oculi crassi et perbreves, aciculo longiores, squami basali ovat&, subacuta, integr!. Antennx externe nude, basi multo longiore quam oculus, aciculo crasso, brevi, apicem articuli 3tii attingente. Pedes toti fere nudi et granulosi, non armati; antici inaequi; manu majore oblonga, convexa, symmetrica, granulis nitidis partim seriatis, carpo multo crassiore, parce latiore. Pares 2di et 3tii crassiusculi, articulo 3tio supra * Tidsk. ii, 251, 252.

18 1852.] 7 scabri-rugato et breviter hirsuto, tarso curvato, canaliculato. Hab. Valparaiso? Long. 2". BERNHARDUS EQUIMANUS.-Carapax sparsim pilosus, regione antica non oblonga, fronte ad medium angulato, vix rostrato. Oculi cylindrici, aciculum antennalem longitudine requantes, squama basali apice producta et 3-4-denticulata. Antennarum externarum flagellum infra elongate ciliatum. Pedes superficie granulati partim sparsim hirsuti, marginibus hirti; antici equi, mediocres, manu breviter elliptich, parce latiore et longiore quam carpus, non costata', marginibus subspinulosis, carpo supra subspinuloso et hirto. Pedum 4 sequentium tarsi bene canaliculati, infra ciliati. Hab. Valparaiso. Long. 12". BERNHARDUS CRINITICORNIS.-Frons medio parce angulatus. Regio carapacis antica, non transversa. Oculi mediocres, aciculo antennali paulo longiores, squaman basali apicem rotundata. Flagellum antennarum externarum infra crinit-um non ciliatum. Pedes antici valde inhequi, nudiusculi, manu majore oblonga, paulo longiore et latiore quam carpus, scabriculat, spinulis subtilissimis 4-5-sexiatis, margine inferiore fere recto, carpo minute spinuloso. Pedes 2di 3tii lax6 pubescentes, non spinulosi, tarso non canaliculato. Hab. portu " Rio Janeiro." Long. 9-10"'. PAGURUS EIuOPSIS.-P. punctulato affinis. Oculi fronte carapacis valde longiores, crassiusculi. Flagellum antennarum externarum nudum, articulis versus antenne extremitatem latere interno gibbosis; aciculum parvulum. Pedes antici sat inaqui, manu majore carpoque oblongis, extus spinulosis et hirsutis. Pedes 2di 3tii marginibus multo hirsuti, articulo 5to spinulis supra paulo armati, tarsis totis subteretibus, undique divaricate hirsutis. Blab. ad insulam " Upolu " et in freto "Balabac." Long. 2k". CLIBANARIUS STRIOLATUS.-Regio carapacis antica fere quadrata. Oculi graciles, margine carapacis antico vix breviores, squama basali angusta, acuminata, bidentatt. Pedes antici subaequi, manubus brevibus carpisque supra spini-tuberculatis et pilosis, manu sinistrat maris paulo majore. Pedes 2di 3tii supra infraque paulo hirsuti, multis lineis brunneis longitudinalibus ornati, tarso subterete, non breviore quam articulus penultimus, sinistro 3tii paris articulo Sto extus parce convexo, acie rectangnlath superne instructo. fab. insula " Tongatabu," et archipelago " Viti." Long. 2"'. Paguro lineato, Edw. propinquus. CLIBANARIUS BRASILIENSIS.-Regio carapacis antica paulo oblonga. Rostrum bene triangulatum. Oculi gracillimi, margine carapacis antico non breviores, squama basali valde truncath et brevissima, pilis longis, margine apicali transverso& instructa. Pedes antici Hequi, manu dextra parce majore. Pedes 2di 3tiique persparsim hirsuti, subnudi, tarso perbrevi, articulo 5to paris 3tii extus subcomplanato, parce convexo, supra subearinato. Pedes colore pauci-lineati. Hab. portu " Rio Janeiro." Long. 141". Clibanarius globosi-manus (Pag. globosi-manus, D.) P. corallino, Edw. adhuc partim descripto an differt? In specimine globosi-mani non attrit&, pedes 2di 3tii marginibus hirsuti non nudiusculi. Clibanariis aliis totis nobis lectis differt, supeficie externa articuli 5ti sinistri paris 3tii omnino hirsuta. II. MEGALOPIDEA. The question of the maturity or immaturity of the MegalopHe and that of their true place in the natural system, still remain in doubt. Without touching on these points, at this time, I propose to describe some new genera and species pertaininlg to the group. The species, however diverse, agree in the structure of the abdomen and its caudal appendages; in the position of the four antennh between the eyes; in the articulations of the outer antennae; in the inner antennae folded longitudinally or obliquely either side of the beak; in the general form of the outer maxillipeds; in the large size and lateral position of the eyes without orbits; in the general structure of the legs; and in their habits. The beak is either horizontal or

19 8 [JANUARY, flexed downward, and has usually a sharp prominent tooth either side of it, exterior to the inner antenne. The genus Megalopa, Leach, as now accepted, embraces two distinct sets of species-the M. Montagui and armata for which it was instituted by Leach, and the M. mutica of Desmarest. The former (the true Megalopae) have the beak nearly horizontal, with rarely a tooth either side, and there is a reflexed spine on the ventral surface of the first joint of the 8 posterior legs. The latter has the beak bent downward vertically, and either side of it there is a prominent spine or tooth; the ventral surface of the base of the legs is unarmed. The A. mutica is very closely related to Monolepis spinitarsus of Say, the onlv difference being that the extremity of the posterior legs in this species of Monolepis bear 3 or 4 setn rather longer than the tarsus, while the descriptions of the mutica make mention of no such setae. The posterior legs in Monolepis fold upa and overlie the carapax: but these legs are otherwise like the preceding, though somewhat smaller, and it is probable that this habit in the M. mutica has been overlooked, as these animals almost always swim with the posterior legs extended like the others, when taken and kept in a jar for examination, and they also have them extended when walking. These legs do not resemble at all the posterior pair in Porcellana or Galathaea. I had examined several species before I discovered this habit with regard to the posterior legs. The animal also throws the fourth pair of legs forward along or over the borders of the carapax, so that the extremity overlies the bases of the eyes and the tarsi hang down in front; and at the same time the two preceding pair are folded up and lie against the sides of the carapax outside of the 4th pair, or the 3d pair may be thrown forward like the 4th. A Sooloo species, and another common off Cape of Good Hope, were observed swimming with the legs thus disposed. Say's genus Monolepis* also embraces two groups, alike in the deflexed front and the longish setae at the extrernity of the posterior tarsi. In one division, including the M. inermis, the tarsi are flattened styliform, and unarmed, with either lateral edge sparsely furnished with minute hairs ; the fossa of the sternum, along which the abdomen lies when inflexed, has a prominent trenchant border; the depression on the carapax for the posterior legs is rather abrupt and somewhat neatly defined; the body is very convex and obese, with the sides high and vertical, and much wider behind than before, being gradually narrowed forward. The other division has the tarsi unguiform, compressed, and spinous below, the antepenult spine always longest; the fossa of the sternum with flaring borders.; the depression of the carapax for the posterior legs shallow concave; the body more flattened above, with the sides more oblique. This division correspoads to Monolepis spinitarsus. Besides the preceding, there is another group of Megalopidea, examined by the author, resembling Megalopa of Leach, except that the tarsus of the posterior legs is narrow lamellar instead of unguiculate, and edged with longish seta somewhat shorter than the tarsus. There is still another group in which the front is horizontal and tricuspidate, the inner antennn when retracted being exposed in the interval between the beak or inner cusp and either outer, lying in view as in Plagusia. With these explanations we give the characters of the genera. 1. MONOLEPISo Say.-Carapax fronte tricuspidatus sed valde deflexus ideoque frons superne visus medio non acutus sed truncatus. Pedes 5ti minores, super carapacem sepe restantes, depressione ad eos recipiendos abrupta, tarsis inermibus, depressis styliformibus, paris postici non depressis, apice 3-4 setis longiusculis (tarso paulo longioribus) instructo. Sterni fossa abdominalis marginibus beiie prominens et subacuta.-monolepis inermis, Say, typus est. 2. MARESTIA, Dana.-Carapax fronte uti in Monolepi. Pedes 8 postici a(l basin infra non armati; 5ti minores, super carapacem supe restantes, depressione ad eos recipiendos parce concava; tarsis styliformibus, unguiculatis, spinis infra -AN--a -i15 - 'Journ. Acad. Nat. Sci., Philad., i. 155.

20 1852.] 9 armatis, paris postici apice setis longiusculis instructis.-typus est Monotepis spinitarsus, Say. Hic pertineret quoque Meg. muttica, Desm. si ejus pedes postici setis longiusculis confecti; aliter genus alterum instituendum. Verbum "Marestia " clarissimum Desmarest commemorat. 3. MEGALOPA, Leach.-Carapax fronte simpliciter rostratus, rostro vix deflexo, acuto. Pedes 8 postici ad basin infra uni-spinigeri: 5ti minores, tarso sty]iformi.-typus 'leg. Montagui, Leach.* 4. CYLLENE, Dana.-Carapacis frons uti in Megalopa. Pedes 8 postici ad basin infra uni-spinigeri; 5ti minores, tarso anguste lamellato, setis longiusculis partim ciliato. 5. TRIBOLA, Dana.-Carapax fronte horizontali3 tricuspidatus, rostro (vel cuspide median&) tenui, cuspidibus (vel dentibus) externis vix longiore. Antenna interne inter rostrum et cuspides externas aperte inflexae. Pedes postici minores, tarso unguiculato setisque longis non instructo. Descriptiones Megalopideorum adhuc ineditac. MARESTIA ELEGANS.-Carapax antice angustuis et superne visus bilobatus, lateribus fere parallelis, pone oculos vix salientibus. Pedes antici parvi, manu oblonga, margine inferiore et partim superficie interna remote hirsutis. Pedes 2di marginibus sparsim ciliati, tarso infra 7-spinoso, ad basin tuberculum infra non gerente. Tarsi postici infra 6-spinosi, apice unguiculati et 4 setis longis instructi. Xab. Promontorio Bonae Spei. Long. Carapacis 4-5"'. An Megalopa mutica Krau4ssii (Sudaf. Crust. p. 54) et De Iaanii (Faun. Japon. p. 167)? Sed pedes postici extremitate setis tarso paulo longioribus instructi. MARESTIA ATLANTICA.-Carapax antice angustus et superne visus bilobatus, lateribus postice paulo divergentibus, pone oculos vix salientibus. Pedes antici parvi, manu oblong&, nuda aut nudiuscul'. Pedes 6 sequentes nudiusculi, tarso infra quinque spinas tuberculumque ad basin instar calcis gerente. Tarsi postici parvuli, sed setularum duabus paribus infra instructi, non spinosi, apice unguiculati et tribus setis longis armati.-hab. lat. aust. 60, long. oce. 24q. MARESTIA PERVALIDA.-Carapax antice latus et superne visus obsolete quadrilobatus, lobis subequis, lateribus postice non divergentibus, prope medium unidentatis. Pedes antici pervalidi, manu valde crassa, tumida. Tarsi postici infra spinosi, apice tribus setis longiusculis armati.-hab. lat. bor. 60, long. orient MONOLEPIS ORIENTALIS.-Sterni segmenta fossam sterni includentia antica margine interiore fere truncata, vix triangulata; segmenta proxima convexa, non tuberculigera. Tuberculus medianus inter aream buccalem et fossam sterni simpliciter subtriangulatus, antice acutus, postice hemisphericus, utrinque depressione deinde septo brevi antice et oblique producto cinctus. Tarsus pedis postici brevis, non unguiculatus, apice tribus setis longiusculis armatus, infra setulis paucis perbrevibus necque spinis instructus. Hab. in mari Suluensi. Long. carapacis 4"'.-,M. inermis differt, sterni segmentis anticis intus non subtruncatis sed prominenter triangulatis, proximis unituberculatis, tuberculo mediano inter aream buccalem et fossam sterni tuberculis tribus composito.t CYLLENE HYALINA.-Rostrum parce prominens. Carapax subovatus, lateribus pone oculos paulo saliens, postice inermis. Thorax infra ad extremitatem pos- * Malac. Pod. Brit. pl. 16. Leach describes three other species, (not noticed by Edwards,) in l'uckey's Exped. to the Zaire, (London, 1818,) p The M. Cranchii may be a true Megalopa; the others have a deflexed beak. t The author is indebted to Prof. L. R. Gibbes, of Charleston, S. C., for the privilege of examining specimens of the M. inermis. They were obtained by him from the stomach of a fish off the Atlantic coast between New York and Charleston, in See Rep. Crust. in U. S. Collections, by Prof. Gibbes, in Proc. Amer. Assoc. Charleston, 1850, vol. iii. p

21 10 [JANUARY, teriorem inermis. Pedes antici mediocres, carpo inerml, manu paulo tumida, supra subgibbosa, digitis hiantibus, apice inflexis et acutis. Pedes 2di 3tii 4tique subaqui, tarsis fere rectis, longis, articulo penultimo longioribus. Ilab. in mari Atlantico juxta " Rio Negro " Patagonine, et in mari Pacifico prope "9 Valparaiso." Long. carapacis 3-4"'. CYLLENE FURCIGER.-Rostrum elongatum, spiniforme, frontis latitudine non brevior. Thorax infra ad extremitatem posterlorem duabus spinis longis divergentibus postice productis armatus. Pedes antici angusti, carpo articuloque secundo spina brevi curvat'a armatis, brachio inermi. Tarsi 2di 3tii 4tique parce armati, styliformes.-hiab in mari Suluensi. TRIBOLA LATA.-Carapax late ovatus non pubescens, paulo longior quam latus, lateribus pone oculos parce undulatis, rostro lineari, dentibus frontis lateralibus rostro remotis, apice acutis et paulo divaricatis. Pedes antici parvuli, tenues, manu pedibus sequentibus vix crassiore. Hab. in mari Atlantico, prope insulas " Canary ;" e stomacho piscis " Bonito " lecta. Long. corporis fere J". TRIBOLA P1TBESCENS.-Carapax oblonaus, subovatus, pubescens, lateribus pone oculos undulatis, rostro lineari, dentibus frontis lateralibus rostro minus remotis. Pedes toti dense brevissimeque pubescentes; antici rostrum paulo superantes, angusti, inequi, manu dextr& non latiore quam carpus. Pedes 8 sequentes fere duplo longiores, 2dis brevioribus quam 3tii. Hab. in Archipelago " Paumotu" mari Pacifico. Conspectus Crustaceorum, 'c. Conspectus of the Crutstacea of the Exploring Expedition under Capt. C. Wilkes, U. S. N. By JAMES D. DANA. MACROURA. We follow De Haan in placing the genus Galathaea with Ihe Anomoura; and near it we arrange 2Eglea, which widely differs from most other related species in having, penicillate instead of foliose branchie. The Macroura, excluding these groups, includes three distinct sections or subtribes. One, the " Fossores " of authors, or the THALASSINIDEA, has close relations on one side with the Paguri, and on the other with the Squillida. They constitute a line of gradation between these extremes, independent mostly of the other Macroura, and osculating only with the Astaci, although removed from them in general habit and structure. There is a diversity among the legs as to form and position, which is not found in any other Macroura, and calls to mind the Paguri. Moreover, there is in general a looseness of structure, a length of abdomen, and sluggish habit of body, unlike the trim compact forms of the typical Macroura. The anterior feet are thrown directly forward and are thus fitted for the burrowing habits of the species. The second subtribe-the ASTACIDEA-is composed of the highest grade of Macroura, approachinw in some points of structure the Brachyura. This is seen in the fact that the sides of the carapax fold under and unite to the epistome, as is well shown in Scyllarus and less perfectly in Astacus; also in the absence or small size of the basal scale of the outer antenna. The Astaci are the transition species between the other Astacidea and the Caridea, and in the genus Parareephrops, White, the antennary scale is not smaller than is common in the latter group. Yet they properly form part of the same section with the Scyllari and Palinuri, rather than a separate division as made by Milne Edwards; they differ from all the Caridea in the transverse suture across the carapax near its middle. The third section-the CARIDEA-includes the typical Macroura, which have the sides of the carapax not soldered to the epistome, and a large basal scale to the outer antenn.* * The Cumt would constitute another section-cunidea-if mature animals. But according to recent researches of Prof. Agassiz, as he has informed the author. they are in some cases, and probably in all, immature forms of PalEemon, Crangon, and other known Macroural genera.

22 1852.] 11 These subtribes may be divided into families. Siebtribe 1. Thalassinidea. This section, as Milne Edwards observes, includes two strongly marked divisions; one, with only the ordinary thoracic branchi;e, and a second with the addition of abdominal branchial appendages, as in the Squillidl. The former we name the Thalassinidea.Eubranchiata, the latter, the Thalassinidea Anomobranchiata. The first group embraces three families, differing strikingly in outer maxillipeds and abdomen, as explained beyond. The second contains only two genera, Callianidea, Edw., and Iscea, Guerin-the last name was changed by Edwards to Callianisea; but as this word is so near Callianassa and Callianidea, a contraction to Callisea wou-ld be preferable. Subtribe 2. Astacidea.-In this subtribe, we adopt De Haan's sections, except that we exclude the,megalopidea, and we do not associate the Thalassinidea with the Astacidea. The sections or families are Scyllaridce, Palinuridce, Eryonidre and Astacida. Leach in 1819 divided the old genus Astacus, naming the marine species (Homarus.Edw.) Astacus, and the fresh water (Astacus, Edw.) Potamobius. Edwards' division, of like character, now generally accepted, was not published till Leach hence has the priority. But according to Leach, the name Astacus is appropriated, not to the typical part of the group, that including the Astacus fluviatilis of old authors, or Cancer Astacus of Linnaeus, and which embraces at the present time numerous species, but to that including the Cancer Gammarus of Linnaeus, still but a small group. There is hence much objection to the names of Leach, and moreover much confusion would now ensue from their adoption. There seems therefore to be sufficient reason for rejecting them, if it be of no weight that they have remained for 30 years unrecognised by British authors. They are adopted in the Catalogue of British Crustacea of the British Museum, published in 1850, but not in the general catalogue of Subtribe 3. Caridea.-In arranging the Caridea into groups, much stress is usually laid upon external form and length of beak. The unimportance of these characters is inferrible from the fact that they involve no essential variations of structure. Moreover, in a single natural group we may find both the long and short beak. In the Crangon group, for instance, in which the beak is usually very short and the body depressed, we have a species with the beak and habit of a Hippolyte. There are other characters of more fundamental value; and these have been brought forward by De Haan. The mandibles afford the distinctions alluded to. In one section they are very slender and are bent nearly at a right angle, without enlargement at the crown. In another they are very stout, and somewhat bent above with a broad dilated crown. In a third, they are stout, but not bent, and have a dentate summit. In a fourth they have, in addition to a projecting lateral crown, a large summit process, which is often oblong and very prominent. These forms are characteristic of different sections of the Caridea. The fact that the mandibles bear a palpus or not is of much less importance; for the portion of the mandible which is most essential to its functions is the crown. Among the Palaemoninn, there are genera having a mandibular palpus, and otbers without one; while the two kinds in other respects are remarkably close in their relations. We have found moreover that in this group, the length of the palpus varies with the disjunction of the 2d and 3d flagella of the inner antennae. If these flagella are separate to their bases inearly, (as in Palamon,) the palpus is long and 3-jointed; if united for some distance up, the palpus becomes short and finally only 2-jointed (Palemonella;) if united nearly or quite to their summits, there is no palpus.* In the arrangement of the genera into families, the fact whether the lst or 2d ' In our genus PakemoneZla, the palpus of the mandible is 2-jointed, and in An chistia, which is closeiy like Palemon in habit in some of its species, there is no palpus, as in the Pontonite; and thus the transition to the Pontonite from Palemon is exceedingly gradual. Harpilius and CEdipus (Pontoniae of authors) fill up the interval between Anchistia and the true Pontoniae. They are all similar in having the 2d pair of legs largest, and in other prominent characteristics.

23 12 [JANUARY, dair of legs is the stouter, is of great weight, much greater than previous authors have recognised. In the Brachyura, the anterior pair is uniformly the strong pair; and this uniformity through so extensive a group shows that the variations from it must be of importance in classification. This peculiarity of the Brachyura is a consequence of the concentration of force in the cephalic or anterior portion of the cephalothorax; and the diffusion of this force posteriorly, which in different degrees marks the Macroura, is especially exhibited in the legs. It is therefore of no little interest to observe whether the first or the second pair is the larger, or whether the degradation is still greater and the 3d pair is chelate like the 2d and even stouter, as in the Penaei. By regarding this character we are led to place Hippolyte and Rhyncocinetes with Alpheus, instead of with Palemon; also Hymenocera and Pontonia with Palaemon, instead of with Alpheus; Pasiphaea in a distinct group from the Penzei, &c. Moreover, the Peneinea, viewed in this light and stripped of some unrelated genera, make a natural group, for they are characterized by having the third pair of legs like the second, instead of like the fourth. In the lowest forms among the Penaeinea, there are nio chelate or didactyle legs, and the species approach the Schizopods. In the preceding paragraphs we have but hinted at some of the more prominent principles involved in the classification of the Macroura here presented, a fuller exposition of which will be given in another place. Below is a synopsis of the arrangement thus arrived at, and following this synopsis, are our descriptions of new species. Synopsis Familiarum Crustaceorum Macrourorum. L. THALASSINIDEA, vel MACROURA PAGURO-SQUILLIDICA. Carapax sutura transversa notatus, posticeque suepe suturis duabus longitudinalibus. Abdomen sepius multo elongatum. Antenn. externa squama basali sive nulla sive parvula instructoe. Pedes 2 antici prorsum projecti; 6 postici habitu raro consimiles. Species fossores. Legio I. THALASSINIDEA EUBRANCHIATA. Brancihiis thoracicis instructa tantum. Fam. 1. GEBID3.-Maxillipedes externi pediformes. Appendices caudales et alie abdominales latae. Fam. 2. CALLIANASSIDAc.-Maxillipedes externi operculiformes. Appendices caudales latee. Fam. 3. THALASSINIDAE.-Maxillipedes externi pediformes. Appendices caudales lineares. II Legio 1I. THALASSINIDEA ANOMOBRANCHIATA. ASTACIDEA vel MACROURA SUPERIORA. Carapax sutura transvers'a saepius notatus, lateribus anterioribus epistomate connatis. Antennu externae squama basali sive iiullk sive parva instructu. Abdomen sat breve vel mediocre. Branchiae penicillatue. Pedes 2 antici oblique projecti; 6 postici directione consimiles. 1. Antennce externcz squama bhasali non instructa. Pedes antici monodactyli. Fam. 1. SCYLLARIDE.-Carapax valde depressus, marginibus lateralibus sat tenuibus, carapace lateraliter subito iniflexo. Antennae externe laminata, breves. Sternum trigonum. Fam. 2. PALINURID]E.--Carapax subeylindricus, lateraliter late rotundatus. Antennae externa basi subcylindricae, longe. Sternium trigonum. 2. Antennea externce squama basali instructcz. Pedes antici didactyli. Fam. 3. ERYONIDE.-Carapax non oblongus, depressus, lateribus subito inflexis, abdomine multo angustiore. Fam. 4. ASTACIDAE.-Carapax oblongus, subcylindricus, abdomine parce angustiore. Sternum angustum.

24 1852.] 13 III. CARIDEA. Carapax sutura transversa non notatus, cephalothoracem plerumque tegens, lateribus anterioribus liberis, epistomate non connatis. Antennae externre squami basali grandi instructze. Corpus sive subcylindricum sive paulo compressum. Branchize saepius foliosae. Legio I. PALIEMONINEA. Pares imi 2dique pedum, unus vel ambo, chelati; 3tii 4tis similes. Maxillipedes 2di breves, lamellatoe. Fam. 1. CRANGONIME.-Mandibule graciles, valde incurvatae, non palpigerae, corona angusta et non dilatata. Pedum pares lini 2di inter se valde inaequi. Fam. 2. ATYIDmE.-Mandibule crassae, non palpigeree, corona lath, parce bipartita, processu terminali. brevi et dilatato. Pedum pares lmi 2dique inter se aequi, carpo nunquam annulato. Fam. 3. PALXMONIME.-Mandibulae crassae, sive palpigerme sive non palpigerae, supra profunde bipartitae, processu apicali oblongo, angusto. Legio II. PASIPH2EINEA. Pedes imi 2dique chelati, 3tii 4tis similes. Maxillipedes 2di tenuiter pediformes. Fam. 1. PASIPHrImDE.-Mandibulae uti in Atyidis. Legio III. PENAEINEA. Pedes 3tii 2dis similes, s&epius chelati, 3tiis majoribus; nisi chelati, toti vergiformes et debiles. Fam. 1. PENEI1DE.-Pedes 3tii bene didactyli, validiores, 2dis similes. Palpus mandibularis latus. Fam. 2. SERGESTIDX.-Pedes 3tii 2dique sive vergiformes sive obsolete chelati, lmis vergiformibus. Pal pts mandibularis gracilis. Fam. 3. EucoPIDE.-Pedes 3tii 2dique vergiformes; imi maxillipedesque externi aeque monodactyli et subprehensiles, digito in articulum penultimum claudente. Palpus mandibularis gracilis. Synopsis Szthfamiliarum Generitmqute Crustaceorum Macrouro-um Vivetium. Legio I. Subtribus I. THALASSINIDEA. THALASSINIDEA EUBRANCHIATA. Farn. 1. GEBIDAE. G. 1. GEB1A, Leach.-Digitus manus inferior obsolescens. Pedes 2di 3tii 4ti 5tique monodactyli. Rostrum tridentatum. Antennn externe squamr basali carentes. G. 2. Axius, Leach.-Manus lata, digito inferiore elongato. Pedes 2di minores, sublamellati, didactyli; 3tii 4ti tique monodactyli. Rostrum simplex, triangulatum. Oculi pigmento perfecti. Antennae externn squama basali parva instructn. G. 3. CALOCARIs, Bell.*-Manus gracilis, digito inferiore elong,ato. Pedes 2di minores, cheliformes, 3tii 4ti 5tique monodactyli. Rostrum ac in Axto. Oculi pigmento corneaque carentes. Antenne externn squama basali parva instructae. Segmentum caudale oblongum. G. 4. LAOMEDIA, De Haanz.t-Manus ac in Axio. Pedes 2di monodactyli, quoque 3tii et 4ti;.5ti obsoleti. * "British Crustacea," p t Faun. Japon. Crust., p. 162.